﻿print(1)
print('hello world')
class person():
    def __init__(self,a,b,c='ok'):
        self.a=a
        self.b=b
        self.c=c
        pass

#def __new__(cls):
        # pass


print('hello world')
p=person('sz',19)
print(p.a,p.b,p.c)
